Fantastic job ! I am kitbashing/creating my own standard gauge engine and would like to know what timing belt pulleys and belts you used . Can you supply a link to where you got them ?
By the way , your engine would look awesome running under a live catenary system . I have a home made/ kitbashed standard gauge MU set that I run off my homemade live catenary system . Its very toy like but it does work and works well. Cheers !